Required test plan for chat application using JMeter - jmeter

Question

I am getting a Response code 401 and Response Message as Unauthorized while recorded script through JMeter
Sampler Result
Thread Name: Thread Group 1-1
Sample Start: 2016-07-19 14:40:53 IST
Load time: 285
Connect Time: 0
Latency: 283
Size in bytes: 534
Headers size in bytes: 456
Body size in bytes: 78
Sample Count: 1
Error Count: 1
Data type ("text"|"bin"|""): text
Response code: 401
Response message: Unauthorized
Response headers:
HTTP/1.1 401 Unauthorized
Date: Tue, 19 Jul 2016 09:10:53 GMT
Server: Apache-Coyote/1.1
Pragma: no-cache
Cache-Control: no-store
x-ca-err: 992
Content-Type: application/json;charset=UTF-8
Vary: Accept-Encoding,User-Agent
P3P: CP="This is not a P3P policy. Please see http://www.networkfleet.com/privacy-policy/ for the official privacy policy."
Keep-Alive: timeout=3, max=99
Connection: Keep-Alive
Content-Length: 78
Content-Encoding: gzip
HTTPSampleResult fields:
ContentType: application/json;charset=UTF-8
DataEncoding: UTF-8
Response Data
{
"error":"invalid_request",
"error_description":"Validation error"
}

Answer 1

Depending on authentication information your application expects you can work it around in several ways:
Basic HTTP (looks like modal pop-up window when you're trying to open protected page). To bypass it add HTTP Authorization Manager to your Test Plan and provide credentials there. See How to Use HTTP Basic Authentication in JMeter article for details.
Missing or incorrect parameter. Some applications use dynamic parameters for security purposes and if you recorded it - it is hard-coded and cannot be replayed successfully. Try recording your application 2 times and inspect request details for differences. If there are any - work them around using JSON Path PostProcessor